Extract first non-NaN of each row without loop

8 ビュー (過去 30 日間)
Dave
Dave 2021 年 10 月 24 日
コメント済み: Dave 2021 年 10 月 24 日
Hello, from a matrix where each row contains at least one non-NaN, is there away to extract the FIRST non-nan of each row without using a loop?
A=[NaN,444,NaN,NaN,41;
NaN,NaN,NaN,222,NaN;
NaN,NaN,554,554,NaN;
125,747,21,NaN,4;
NaN,NaN,NaN,43,NaN;
NaN,98,NaN,75,NaN;
NaN,22,NaN,NaN,NaN]
From matrix A, I would like to arrive to B
B=[444;222;554;125;43;98;22]
Thanks
  1 件のコメント
Dave
Dave 2021 年 10 月 24 日
編集済み: Dave 2021 年 10 月 24 日
I am able to do it one row at a time, for example for the last row
A(7,find(~isnan(A(7,:)), 1, 'first'))
But without a loop I cannot do it for all rows

サインインしてコメントする。

採用された回答

Walter Roberson
Walter Roberson 2021 年 10 月 24 日
A=[NaN,444,NaN,NaN,41;
NaN,NaN,NaN,222,NaN;
NaN,NaN,554,554,NaN;
125,747,21,NaN,4;
NaN,NaN,NaN,43,NaN;
NaN,98,NaN,75,NaN;
NaN,22,NaN,NaN,NaN]
A = 7×5
NaN 444 NaN NaN 41 NaN NaN NaN 222 NaN NaN NaN 554 554 NaN 125 747 21 NaN 4 NaN NaN NaN 43 NaN NaN 98 NaN 75 NaN NaN 22 NaN NaN NaN
B = A(sub2ind(size(A), (1:size(A,1)).', sum(cumprod(isnan(A),2),2)+1))
B = 7×1
444 222 554 125 43 98 22

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeSimulation についてさらに検索

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by